{"id":24271,"date":"2022-02-02T14:27:24","date_gmt":"2022-02-02T14:27:24","guid":{"rendered":"https:\/\/1-grid.com\/knowledge\/default-linux-configuration-for-servers\/"},"modified":"2025-05-27T13:34:39","modified_gmt":"2025-05-27T13:34:39","slug":"default-linux-configuration-for-servers","status":"publish","type":"ht_kb","link":"https:\/\/1grid.co.za\/knowledge\/default-linux-configuration-for-servers\/","title":{"rendered":"Default Linux Configuration for Servers"},"content":{"rendered":"<div class=\"WordSection1\">\n<p><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">Welcome to your new VPS or Dedicated Server. Please find below some default network configurations applied to your Server during the deployment process. We have also included some security tips to help you secure access to your Server.<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Default network configuration<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">Your server is configured with at least one public static IP address. Please do not attempt to remove or change these IP addresses, as it will result in access to your server being lost. Should this occur, 1-grid will, unfortunately, have to bill you an admin fee.<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">Your Server is preconfigured to use a provided set of DNS resolvers. These DNS resolvers, or name servers, are only used to resolve your hostname lookups and will not be able to serve as name servers for any of your domains.\u00a0<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">Your server\u2019s time should already have sensible defaults with the time zone set to GMT+2. However, if you wish to customise it, we have an Internet Time Server (NTP server) available.<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">In order to ensure we provide you with the best uptime possible for your dedicated or VPS server, we have a monitoring system in place (monitoring ICMP requests to your server). Should you wish to block ICMP but would like us to continue monitoring your server, please add an exception to the below IP address:<\/span><\/p>\n<p style=\"margin-left: .5in; text-indent: -.25in; mso-list: l1 level1 lfo1;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: Symbol;\"><span style=\"mso-list: Ignore;\">\u00b7<span style=\"font: 7.0pt 'Times New Roman';\">\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/span><\/span><\/span><strong><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">41.185.10.74<\/span><\/strong><\/span><\/p>\n<p style=\"margin-left: .5in; text-indent: -.25in; mso-list: l1 level1 lfo1;\"><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">Here you will find some tips on keeping your server secure to prevent undesirable events from happening (Examples: loss or exposure of sensitive\/ critical data or bandwidth overages.<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">For your Linux VPS or Dedicated Server, you would want to start with securing your SSH connection to the server and then move on to securing any applications or websites you plan on running. In the Table below you will find a list of the common usernames and passwords used in a generic SSH brute force attack.<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">What can you do to protect your server?<\/span><\/strong><\/span><\/p>\n<ul type=\"disc\">\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo2;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Don&#8217;t allow root login via ssh: require sudo instead.<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo2;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Don&#8217;t allow passwords over ssh: Require private RSA\/DSA key authentication<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo2;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">If allowing passwords over ssh, don\u2019t use obvious or common passwords<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo2;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Don&#8217;t use common usernames.<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo2;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Use an allow list, and only allow users that require SSH Access.<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo2;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">If you make use of a VPN or fixed-IP service, consider only allowing ssh access from those IP addresses via firewall and hosts.allow.<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo2;\"><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">Use software like fail2ban or SSHguard to catch-and-block brute force attacks.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">\u00a0<\/span><\/p>\n<p><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><a href=\"http:\/\/www.sshguard.net\/\" rel=\"noreferrer\">http:\/\/www.sshguard.net\/<\/a><\/span><\/p>\n<p><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><a href=\"http:\/\/www.fail2ban.org\/wiki\/index.php\/Main_Page\" rel=\"noreferrer\">http:\/\/www.fail2ban.org\/wiki\/index.php\/Main_Page<\/a><\/span><\/p>\n<ul type=\"disc\">\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l3 level1 lfo3;\"><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\">Make sure your OS is always up to date with the latest security patches. You can use yum-cron (CentOS) or unattended-upgrades (Ubuntu) for this.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">For your application or websites, please consider the below points<\/span><\/strong><\/span><\/p>\n<ul type=\"disc\">\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l2 level1 lfo4;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Make sure your application is always up to date, in particular security packages.<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l2 level1 lfo4;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Lock down your application &#8216;admin&#8217; pages. Much of the advice above applies to the admin area of your application too.<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l2 level1 lfo4;\"><span style=\"color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Password Protect your admin area, something like htpasswd for web console will protect any underlying application vulnerabilities and create an extra barrier to entry.<\/span><\/span>\u00a0<\/span><\/li>\n<li class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l2 level1 lfo4;\"><span style=\"font-size: 14pt; font-family: Tahoma, sans-serif; color: #000000;\"><span style=\"font-size: 14.0pt; font-family: 'Tahoma',sans-serif;\">Lock down file permissions. &#8216;Upload folders&#8217; are notorious for being entry points for hackers.<\/span><\/span><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Welcome to your new VPS or Dedicated Server. Please find below some default network configurations applied to your Server during the deployment process. We have also included some security tips to help you secure access to your Server. Default network configuration Your server is configured with at least one public&#8230;<\/p>\n","protected":false},"author":21,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"ht-kb-category":[1178],"ht-kb-tag":[1393,276,1392,574,898],"class_list":["post-24271","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-servers","ht_kb_tag-configuration","ht_kb_tag-default","ht_kb_tag-hositng","ht_kb_tag-linux","ht_kb_tag-server"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Default Linux Configuration for Servers - 1-grid Knowledge Base<\/title>\n<meta name=\"description\" content=\"default network configurations applied to your Server during the deployment process Default Linux Configuration for Servers\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/1grid.co.za\/knowledge\/default-linux-configuration-for-servers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Default Linux Configuration for Servers - 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